CD-Key tied to Account?? This was started in another thread but was off-topic so I started this thread to clarify. I always thought the same as Raena. If I went to my Sisters house and played on her computer it would be under her CD-Key, since that is the computer that her version was installed on. The CD-Key unlocks the program for that computer, not an account. So your acct will be tied to the CD-Key that was used to install the game on the computer that your playing on.